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List:       r-sig-mac
Subject:    [R-SIG-Mac] Intermittent plotting failures on new Quartz window
From:       Chris Black <black11 () igb ! illinois ! edu>
Date:       2016-04-30 21:21:05
Message-ID: 3BE45281-70CD-4FDE-8678-06C5BA6A32C0 () igb ! illinois ! edu
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Hi, all. I'm getting some puzzling, intermittent plot failures that seem to occur \
only when I'm in an interactive session, arranging plots with very different drawing \
speeds, and only when Quartz needs to open a new window before plotting. 

I posted a longer version of this at \
https://gist.github.com/infotroph/c68fc7a3f8594473361f87e2a348ddf9, but here's a \
minimal example:

set.seed(34565)
library(ggplot2)
library(gridExtra)
library(grid)

p1 = ggplot(diamonds, aes(x, price))+geom_point() 
p2 = ggplot(mtcars, aes(wt, mpg))+geom_point()

graphics.off()
pp=arrangeGrob(p1, p2)
grid.draw(pp)

Expected result: New graphics window containing a two-panel plot with diamonds on the \
top and cars on the bottom. Observed result: Usually (~80% of the time?), a new \
graphics window with the top panel incompletely drawn (usually just axes with no \
points or panel grid), and the bottom panel as expected. Rarely (~20%?), the complete \
plot as expected. 

I can modulate the success rate somewhat by putting different lengths of Sys.sleep() \
in between the arrangeGrob and grid.draw calls, and I can guarantee success by \
calling dev.new() before arrangeGrob. See the above-linked Gist for details and for \
session info from a few other folks — thus far only the Quartz users can reproduce \
it, hence my starting with this list. 

Session info:

R for 3.2.4 GUI 1.67 Mavericks build (7152)
R version 3.2.4 (2016-03-10)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.11.3 (El Capitan)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods  
[8] base     

other attached packages:
[1] gridExtra_2.2.1 ggplot2_2.1.0  

loaded via a namespace (and not attached):
[1] labeling_0.3     colorspace_1.2-6 scales_0.4.0     plyr_1.8.3      
[5] tools_3.2.4      gtable_0.2.0     Rcpp_0.12.4      munsell_0.4.3   
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